I got "protect" when configuring my Sony. I'd hooked up one of the speakers wrong polarity.

You don't say which Sony you have, but there may be an option in the menu system to customize your speaker settings. It might think your speakers are small if you also have a sub. A quick search of the online PDF manual for my receiver says that Protector is activated when it detects a short circuit in one or more speaker. I would double check all your speaker cables/hookups.

make sure the speakers you are using are 8 ohm...also Sony receivers have always been known to be limited on power output compared to their ratings...it is also highly likely that a frayed wire somewhere is shorting out when you get x (45) level of power running though it (the wires may not be touching, but once enough power is being run it creates an arch and shorts out causing the amp to go into protect).

Are you the same person who has bought equipment to run 1800 watts of audio out to one pair of speakers to cover some 15,000 square feet? If so, I humbly suggest that if a Sony amp goes into Protect mode under your care, you hire a pro for that job, as several people have recommended.

We can't give you a good answer, or maybe any, without the make and model of everything."The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw

Hey Mike, How many watts per channel does your Sony have? What is the brand & model number of your speakers? How old? Are they 8 ohm speakers?What kind of wire are you using? How long? What is the gauge? Sorry for all the questions, but its important to narrowing it down. If your Speakers are 4 ohm, this could be the problem. Of course, wiring problems or shorts could certainly cause it. Are your Speakers efficient? ( how much power is necessary to drive them?). When you crank it to +45, you are in he upper range of what power your receiver can put out. More speakers are damaged by amps that do not have enough power then too much power. When the amp runs out of power (at peak nano seconds;) especially bass, the amp goes into clipping. Clipping causes speakers to blow, amps to blow, etc.

Please read the following: Unsolicited commercial advertisements are absolutely not permitted on this forum. Other private buy & sell messages should be posted to our Marketplace. For information on how to advertise your service or product click here. Remote Central reserves the right to remove or modify any post that is deemed inappropriate.